Moderate Security Update for nginx: Addressing Data Injection Vulnerability

nginx Updated 27 Mar 2026

Summary

24/03/2026

Disclosed on

N/A

Severity

Yes i

Fix available

Unrated

Severity

Not published

CVSS Score

ALSA-2026:5599: Moderate: nginx security update. Affects nginx versions < 2:1.20.1-24.el9_7.1.alma.1. Fixed in 2:1.20.1-24.el9_7.1.alma.1. How to fix ↓

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Background

nginx is a high-performance web and proxy server that supports HTTP and other protocols, designed for high concurrency, performance, and low memory usage. It is widely used for serving static content, load balancing, and as a reverse proxy. The recent vulnerability affects nginx and its modules, potentially compromising the security of proxied connections.

Vulnerability Detail

The vulnerability identified as CVE-2026-1642 allows for data injection via a man-in-the-middle attack on TLS proxied connections. This could enable attackers to intercept and manipulate data being transmitted, leading to unauthorized access or data breaches. The issue arises from improper handling of TLS connections, making it critical for users to address this vulnerability promptly.

How To Fix

Minimum fixed version

2:1.20.1-24.el9_7.1.alma.1

This is the first release that contains the fix.

sudo dnf update nginx

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Workaround

As a temporary workaround, consider disabling TLS proxied connections until the package can be updated. However, this is not recommended for long-term use as it may expose your application to other risks.

Conclusion

The nginx security update addresses a critical vulnerability that could allow for data injection through TLS proxied connections. It is essential for users to update their packages to the patched version to mitigate risks. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.

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